MCP4251-104E

{
  "schema_version": 1,
  "type": "component",
  "slug": "mcp4251-104e",
  "title": "MCP4251-104E",
  "brief": "Microchip Tech Digital Potentiometers, TSSOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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    "data acquisition",
    "mcp4251-104e",
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  "component": {
    "mpn": "MCP4251-104E",
    "manufacturer": "Microchip Tech",
    "package": "TSSOP-14",
    "pin_count": 14,
    "category": "Data Acquisition",
    "subcategory": "Digital Potentiometers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589807999771709440",
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    "distributor_links": {
      "lcsc": "C637079"
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      "checked_at": "2026-10-20T17:21:05Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CS",
        "type": "input",
        "description": "SPI chip select input: forcing CS to VIL enables serial commands and forcing it to VIHH enables high-voltage serial commands; the input is high-voltage tolerant with Schmitt trigger and up to 12.5V."
      },
      {
        "number": "2",
        "name": "SCK",
        "type": "input",
        "description": "SPI serial clock input (10 MHz, SPI modes 0,0 and 1,1), high-voltage tolerant with Schmitt trigger and an internal smart weak pull-up."
      },
      {
        "number": "3",
        "name": "SDI",
        "type": "input",
        "description": "SPI serial data input, connected to the host controller's SDO pin; high-voltage tolerant with Schmitt trigger input."
      },
      {
        "number": "4",
        "name": "VSS",
        "type": "power_in",
        "description": "Device ground reference; terminal voltages on all potentiometer terminals must be between VSS and VDD."
      },
      {
        "number": "5",
        "name": "P1B",
        "type": "passive",
        "description": "Potentiometer 1 terminal B, the fixed connection to the zero-scale wiper value (0x00); the voltage must be between VSS and VDD and it can carry positive or negative current."
      },
      {
        "number": "6",
        "name": "P1W",
        "type": "passive",
        "description": "Potentiometer 1 wiper terminal; the voltage must be between VSS and VDD and it can carry positive or negative current."
      },
      {
        "number": "7",
        "name": "P1A",
        "type": "passive",
        "description": "Potentiometer 1 terminal A, the fixed connection to the full-scale wiper value (0x100 for 8-bit devices); the voltage must be between VSS and VDD and it can carry positive or negative current."
      },
      {
        "number": "8",
        "name": "P0A",
        "type": "passive",
        "description": "Potentiometer 0 terminal A, the fixed connection to the full-scale wiper value (0x100 for 8-bit devices); the voltage must be between VSS and VDD and it can carry positive or negative current."
      },
      {
        "number": "9",
        "name": "P0W",
        "type": "passive",
        "description": "Potentiometer 0 wiper terminal; the voltage must be between VSS and VDD and it can carry positive or negative current."
      },
      {
        "number": "10",
        "name": "P0B",
        "type": "passive",
        "description": "Potentiometer 0 terminal B, the fixed connection to the zero-scale wiper value (0x00); the voltage must be between VSS and VDD and it can carry positive or negative current."
      },
      {
        "number": "11",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection; the datasheet recommends connecting it to VDD or VSS to reduce possible noise coupling."
      },
      {
        "number": "12",
        "name": "SHDN",
        "type": "input",
        "description": "Hardware shutdown input that forces the resistor network terminals into the hardware shutdown state; high-voltage tolerant with Schmitt trigger input."
      },
      {
        "number": "13",
        "name": "SDO",
        "type": "output",
        "description": "SPI serial data output connected to the host controller's SDI pin, used to read wiper/TCON/status registers; it is an open-drain output using the internal smart pull-up, so external pull-up resistors can increase its rate."
      },
      {
        "number": "14",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive power supply input referenced to VSS; the operating range is 1.8V to 5.5V, and electrical performance may not meet the data sheet specifications while VDD is below 2.7V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Page 1 package drawing for MCP42X1 (PDIP/SOIC/TSSOP) labels the right-side pin in the 11-14 group as; Table 3-1 gives the 14-lead column for MCP42X1 dual potentiometer devices. The MCP4251 is a dual pot; The pin type for SDO is taken as output per Table 3-1 (O), while Note 3 describes it as an open-drai"
        ],
        "pages_sent": 19,
        "cost_usd": 0.0687,
        "at": "2026-10-20T17:19:26"
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        "pages": 88,
        "sha256": "6c60b083b2ef0a92",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
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  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "TSSOP-14",
      "Category": "Data Acquisition",
      "Pins": "14"
    },
    "appearance": {
      "contacts": {
        "quote": "P = Plastic Dual In-line (PDIP) (300 mil), 8/14-lead SN = Plastic Small Outline (SOIC), (150 mil), 8-lead",
        "page": 85,
        "doc": "ds.pdf",
        "plating": "tin"
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      "rows": [
        {
          "name": "Resistance RAB (±20%, -104 devices)",
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        {
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          "unit": "Ω",
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          "source_page": 5,
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        },
        {
          "name": "Nominal Resistance Match (MCP42X1)",
          "symbol": "|RAB0 - RAB1| / RAB",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.2,
          "max": 1.25,
          "conditions": "MCP42X1 devices only",
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          "source": "datasheet"
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        {
          "name": "Maximum current through A, W or B",
          "symbol": "IW",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 2.5,
          "conditions": "Worst case current through wiper at full or zero scale (Note 6)",
          "source_page": 5,
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        },
        {
          "name": "Full-Scale Error (MCP4XX1)",
          "symbol": "VWFSE",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": -0.1,
          "max": null,
          "conditions": "100 kΩ 8-bit 3.0V ≤ VDD ≤ 5.5V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Zero-Scale Error (MCP4XX1)",
          "symbol": "VWZSE",
          "kind": "electrical",
          "unit": "LSb",
          "min": null,
          "typ": 0.1,
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          "conditions": "100 kΩ 8-bit 3.0V ≤ VDD ≤ 5.5V",
          "source_page": 6,
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        {
          "name": "Potentiometer Integral Non-linearity",
          "symbol": "INL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -1,
          "typ": 0.5,
          "max": 1,
          "conditions": "8-bit 3.0V ≤ VDD ≤ 5.5V; MCP4XX1 devices only (Note 2)",
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        {
          "name": "Potentiometer Differential Non-linearity",
          "symbol": "DNL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": 0.25,
          "max": 0.5,
          "conditions": "8-bit 3.0V ≤ VDD ≤ 5.5V; MCP4XX1 devices only (Note 2)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Rheostat Integral Non-linearity",
          "symbol": "R-INL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -1,
          "typ": 0.5,
          "max": 1,
          "conditions": "100 kΩ 8-bit 5.5V, IW = 45 µA",
          "source_page": 7,
          "source": "datasheet"
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        {
          "name": "Rheostat Integral Non-linearity",
          "symbol": "R-INL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -1.5,
          "typ": 0.25,
          "max": 1.5,
          "conditions": "100 kΩ 8-bit 3.0V, IW = 24 µA (Note 7)",
          "source_page": 7,
          "source": "datasheet"
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        {
          "name": "Rheostat Differential Non-linearity",
          "symbol": "R-DNL",
          "kind": "electrical",
          "unit": "LSb",
          "min": -0.5,
          "typ": 0.25,
          "max": 0.5,
          "conditions": "100 kΩ 8-bit 5.5V, IW = 45 µA",
          "source_page": 8,
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        },
        {
          "name": "High Voltage Limit on CS, SCK, SDI, SDO, SHDN",
          "symbol": "VHV",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 12.5,
          "conditions": "VDD ≥ 4.5V",
          "source_page": 4,
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        {
          "name": "High Voltage Limit (VMAX)",
          "symbol": "VMAX",
          "kind": "electrical",
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        {
          "name": "Weak Pull-up Current",
          "symbol": "IPU",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1.75,
          "conditions": "Internal VDD pull-up, VIHH pull-down, VDD = 5.5V, VCS = 12.5V",
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        {
          "name": "Input Leakage Current",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VIN = VDD and VIN = VSS",
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        {
          "name": "VDD Start Voltage to ensure Wiper Reset",
          "symbol": "VBOR",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.65,
          "conditions": "RAM retention voltage (VRAM) < VBOR",
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        {
          "name": "Supply Current, serial interface active (write)",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 450,
          "conditions": "Serial Interface Active, VDD = 5.5V, CS = VIL, SCK @ 5 MHz, write all 0's to volatile Wiper 0 (address 0h)",
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        {
          "name": "Supply Current, serial interface inactive",
          "symbol": "IDD",
          "kind": "electrical",
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          "min": null,
          "typ": 2.5,
          "max": 5,
          "conditions": "Serial Interface Inactive, CS = VIH, VDD = 5.5V",
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        {
          "name": "Supply Current, serial interface active (decrement)",
          "symbol": "IDD",
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          "unit": "mA",
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          "typ": 0.55,
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          "conditions": "Serial Interface Active, VDD = 5.5V, CS = VIHH, SCK @ 5 MHz, decrement volatile Wiper 0 (address 0h)",
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        {
          "name": "SCK Input Frequency",
          "symbol": "FSCK",
          "kind": "timing",
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          "conditions": "VDD = 2.7V to 5.5V",
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        {
          "name": "SCK Input Frequency",
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        {
          "name": "CS Active (VIL or VIHH) to SCK↑ input",
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        {
          "name": "SCK input high time",
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          "name": "CS Inactive (VIH) to SDO output hi-impedance",
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          "name": "SDO data output valid after SCK↓ edge",
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          "name": "Hold time of CS Inactive (VIH) to CS Active (VIL or VIHH)",
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        {
          "name": "Potentiometer Bandwidth -3 dB (100 kΩ)",
          "symbol": "BW",
          "kind": "electrical",
          "unit": "kHz",
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          "typ": 100,
          "max": null,
          "conditions": "100 kΩ 8-bit Code = 80h (load = 30 pF)",
          "source_page": 6,
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        {
          "name": "Nominal Resistance Tempco",
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          "kind": "temperature_coefficient",
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          "typ": 50,
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          "conditions": "TA = -20°C to +70°C",
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        {
          "name": "Nominal Resistance Tempco",
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        {
          "name": "Nominal Resistance Tempco",
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          "conditions": "TA = -40°C to +125°C",
          "source_page": 5,
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        {
          "name": "Ratiometric Tempco",
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          "kind": "temperature_coefficient",
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          "min": null,
          "typ": 15,
          "max": null,
          "conditions": "Code = Midscale (80h or 40h)",
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          "name": "Leakage current into A, W or B",
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